Refrigerating apparatus for cold storage cabinets



sePt- 28, 1948. M. BURNEY REFRIGERATING APPARATUS FOR COLD STORAGE CABINETS Flled July 27, 1945 lNyENToR. Zion urmfg Patented Sept. 28, 1948 REFRIGERATIN G APPARATUS FOR COLD STORAGE CABINETS Milton Burney, Austin, Tex.

Application July 27, 1945, Serial No. 607,325

Z Claims.

The present invention relates to cold storage cabinets to be used for quick freeze or as an ice cream hardening box for household or commercial use.

The invention proceeds on the well-known fact that the warmest air is .in the top of the box and the coldest air i5 at the bottom. As the air is cooled, it drops to the bottom and warmer air rises therefrom to the top.

The main object of the invention is the design of a cold storage cabinet in which the cooling `coils are located in a position which assures maximum cooling eiliciency.

Another object of the invention is the design of a cold storage cabinet in which the cooling means `are so arranged in the refrigerating space that they occupy as small a portion thereof as possible.

Another object of the invention is the design of a cold storage cabinet of the character described into which the refrigerant is admitted at a point where the temperature is highest and which the refrigerant leaves at a point of considerably lower temperature.

With these and other objects in view the invention resides in the novelty of construction, combination and arrangement of parts described in detail hereinafter and claimed in the appended claims.

For a better understanding of the invention reference may now be hadto the accompanying drawing forming part of this specification, in which- Figure 1 is a plan section of the preferred embodiment of my invention;

Figure 2 is a vertical section at right-angles to the plane of Figure 1 on line 2-2 of Figure 1;

Figure 3 is an enlarged horizontal section on line 3--3 of Figure 2.

In the drawing in which like characters of reference designate like or similar parts, numeral 2 denotes generally a rectangular cabinet which comprises an outer shell 3, preferably of metal and enameled on the outside, and an inner shell or metal liner 4 enameled on the inner side and spaced from the outer shell. The space between the two shells is lled with some suitable insulating material 5 such as cork or bre board. The top of the cabinet is provided with an opening lined with a metallic material 1 enameled on the inner side. A hollow cover 8 of the same material is provided and includes vertical walls 9 and an outer plate I of the same appearance as the outer shell. The space between the plate and the remaining walls of the cover is filled with insulating material Il.

A pipe I2 receiving a refrigerating liquid from a. refrigerating source (not shown) extends into the interior of the cabinet through one of the side walls near the top and forms parallel portions Il. The next lower coils I extend alongside the side walls and leave between themselves a refrigerating space to be occupied by substances in need of refrigeration. These coils along the walls occupy only the outer margin of the upper half for the simple reason that this portion of the interior of the cabinet is more in need of refrigeration than the space of the lower half where the coldest air gathers. The pipe passes again through the wall at I6 midway between the top and bottom to conduct the refrigerating liquid at a much higher temperature than the one prevailing in the pipe portion l2.

The cabinet described and illustrated absorbs the heat in that portion of the refrigerating space where the warmest air gathers and which the coldest air leaves, the top portion. During the process of cooling the refrigerant absorbs heat and thereby has its temperature raise-d. The refrigerant enters the refrigerating space at the point at which the temperature is highest and leaves it at a point at which the temperature is considerably lower.

The invention is not to be limited to or by the details of the particular embodiment thereof illustrated by the drawings, as various other forms of the device will of course be apparent to those skilled in the art without departing from the spirit of the invention or the scope of the claims.

What I claim as new and desire to protect by Letters Patent is:

1 A cold storage cabinet comprising top, bottom and side walls, an aperture in a portion of the top wall, a closure for closing the aperture, cooling coils lining the unapertured portion of the top wall and upper half of the side walls for conducting a refrigerant from a refrigerating space of higher to one of lower temperature, the bottom portion of the chamber of the cabinet providing an unoccupied space for items to be refrigerated.

2. In an insulated cold storage cabinet having an opening in a portion of the top thereof and a. closure for said opening, and cooling coils lining the remainder of the top of the cabinet and the upper portion of the side walls thereof to provide a totally unoccupied space in the cabinet bottom adapted to receive items to be refrigerated, said cooling coils having an inlet at their upper end and an outlet at their lower end.

MILTON BURNEY.

REFERENCES CITED The following references are of recordV in the file of this patent:

UNITED STATES PATENTS 

